Product Description

Overview

The nEXT400D is a hybrid bearing compound turbo pump available with either an ISO160 or a CF160 inlet flange and has a N2 pumping speed of 400ls-1. nEXT pumps combine our proven bearing technology (oil lubricated ceramic lower bearing with dry permanent magnetic upper bearing), an improved rotor design with a new molecular drag stage to deliver improved pumping speed and compression ratios, and true user serviceability. They feature 24V to 48Vd.c. sensor less motors with a built in drive that is fully compatible our range of TAG and TIC controllers. They are available pre-set for 80W or 160W maximum power, the former enabling use with our 100W TIC controllers are also recommended for pumping Argon, but with a longer ramp time to full operating speed.

A basic pump system would require an nEXT400D pump, a TAG or TIC controller, either an air or water cooling accessory and a suitable backing pump.

Technology

New technologies employed in nEXT have enabled the pumps to be serviced in the field. An interim oil lubrication change can be performed, where access allows, in-situ, typically in less than 5 minutes with the minimum of specialist tooling. A bearing and oil lubrication service, with minimum disassembly can be performed in less than 10 minutes using basic workshop tools and an Edwards tool kit.

nEXT pumps will advise the user when a service is due and what level of intervention is required. The request for service is by a simple flashing LED sequence on the pumps, and by serial comms notification.

Flexibility is again key as these simple services can be performed either by the end user, on site by an Edwards Field Service Technician or the pump can be returned to an Edwards service hub.

If required, by using remote diagnostics, a user can also interrogate the pump to determine how long it is to the next service, so that a proactive approach to PM can be accommodated.

Features and Benefits

Fully end user serviceable in minimum time without complex tooling or major disassembly...you can do it!

Compact design with high performance for efficient systemisation

Compatible with Edwards TIC turbo and instrument controllers meaning you can add up to 3 vacuum gauges without the need of an additional gauge controller

RoHS compliant and CSA/UL approved

Technical Data

Inlet flange

DN160ISO-K, DN160CF

Outlet flange

DN25NW

Pumping speed

N2

400 ls-1

He

390 ls-1

H2

325 ls-1

Compression ratio

N2

>1 × 1011

He

1 x 108

H2

5 x 105

Ultimate pressure with RV backing pump ISO/CF

-8 /-10 mbar

Recommended backing pump*

RV12/nXDS10i

Vent port

1/8 inch BSP female

Purge port

1/8 inch BSP female

Max continuous inlet flow (Nitrogen)†

Water cooling (water at 15°C, ambient temp at 40°C)

105 sccm

Forced air cooled, 35 °C ambient

90 sccm

Pump rotational speed

Nominal rotational speed

60000 rpm

Standby rotational speed

Variable from 33000 to 60000 rpm (42000 rpm default)

Programmable power limit settings

Variable from 50-200W (160W default)

Start time to 90% speed

180s‡

Analogue outputs

Pump rotational speed;Power consumption; Pump temp; Controller temp

Cooling method#

Forced air / water

Ambient air temp for forced air cooling

5 - 35°C

Min cooling water flow rate (water 15°C)

15 l h-1

Water temp range

10 - 20°C

Max inlet flange temp

70°C

Operating attitude

Vertical and upright, through to Horizontal +/- 2°

Noise level at 1 metre

Max magnetic field pump can tolerate

5 mT

Recommended controller

TIC200 turbo and instrument controller

Quiescent electrical power

Typically 20 W

* A smaller backing pump may be used depending on application. A suitable diaphragm pump with ultimate † Above this inlet pressure, rotational speed drops to below nominal. ‡ Power limit set to 160 W. # Air and water cooling accessories must be ordered separately